Rotary road drag



Feb. 18, 1930. c. B. SCHERTZ ROTARY ROAD DRAG 2 Sheets- Sheet 1 Fild March 9, 1929 W W H H H H HJH H l l l I l l l In ventbr TI TH H H H H H HWH W U-UH H H H H H I HJH HLH H MN A iiorney Feb. 18, 1930. c, SCHERTZ 1,747,955

ROTARY ROAD DRAG Filed Uarqh 9, 1929 2 Sheets-Sheet 2 I N I N I l 1i! QM l KY r II a? F ll aw v w: 76

Inventor M J1- J1 U345 U D Attorney Patented Feb. 18,1930

PATENT OFFICE CHARLES 1B. SCHERTZ, F CEDAR CITY, UTAH ROTARY Roan DRAG Application filed March 9, 1929. Seria1No. 345,761.

The present invention relates to a rotary road drag and has for its prime object to provide a draghaving aplurality of teeth mounted in a disk which disk will be caused toautomatically rotate as it is dragged along the road. V

Another very important object of the invention resides in the provision of a draw bar structure so that the axis of the rotary disk may be maintained at right angles to the roadway at all times. 1

Another very important object of the invention resides in the provision of a frame 6 structure including an arcuate bar with a weight slidable thereon so that the direction of rotation of the disk may be controlled.

A still further very important object of the invention resides in the provision of a rotary road drag of this nature which is exceedingly simple in its construction, inexpensive to manufacture, strong and durable, thoroughly eflicient and reliable in use and operatiomand otherwise well adapted to the purpose for which it is designe With the above and numerous other objects in view'as will appear as the description proceeds, the invention resides in certain novel features of construction, and in the combination and arrangement of parts as will be hereinafter more fully described and claimed. 6

In thedrawing:

Figure 1 is a top plan view of the rotary road. drag embodying the features of my invention, T

Figure 2 is a side elevation thereof,

Figure 3 is an enlarged detail section taken substantially on the line 3-3 ofFigure 2, and

Figure 4: is a detail section taken substantially on the line t4 of Figure 2.

Referring to the drawings in detail it'will beseen that-the numeral 5 denotes a lateral,

frame beam which is bowed so that its ends point downwardly. A shaft 6 is pivotally connected as at 7 to the center of the beam 5 y to depend downwardly therefrom. A bowed rod 8 is mounted so that its ends are attached to the ends ofithe beam 5 and so as to be in a plane at right angles to the plane of the beam 5 and to extend rearwardly therefrom.

A weight 9 is slidable on therod 8. The numeral 10 denotesa disk which may be hollow if desired so that water, sand or any other material may be placed therein to give the proper weight to the disk. This diskis provided with a marginal flange 11. A plurality of sleeves 12 extend through the disk to receive teeth 14 which are held in place by means of set screws 15 thereby allowing more desirable adjustment.

A pull bar 16 is fixed to the center of the beam 5 and inclining downwardly and forwardly therefrom isattached to the center of a transverse draft bar 17 A pull bar 18 is pivotally engaged as at 19 with the lower portion of the shaft 6 and is pivotally engaged'as'at 20 to a lever 21 pivoted on a rack 22 carried by the pull bar 16.

Obviously by rocking the lever 21, the angle of the shaft may be changed, the object being to maintain said shaft perpendicular to the roadway regardless as to how high the bar 17 may be as this would vary with different I inake tractors.

' The lower end of the shaft 6 is journaled naled thereon to engage under the flange portion 11 of the disk 10 at the front thereof.

Chains 29 connect the ends of the bar 18 with the ends of the beam 5. By having the weight}? situated to the left of the apparatus as is shown in Figure 1, it will be seen that as the apparatus is pulled forwardly it will cause the disk to rotate in a counterclockwise direction and by moving the weight over to the right it would cause the disk to rotate in aclockwise direction. I

It is thought that the construction, utility, operation and advantages of the invention will now be quite apparent to those skilled in this art without a more detailed description thereof.

The present embodiment of the invention has been disclosed in considerable detail merely for the purposes of exemplification since in actual practice it attains the features of advantage enumerated as desirable in the statement of the invention and the above description.

It will be apparent that changes in the details of construction, in the combination and arrangement of parts may be resorted to .withoutdeparting from the spirit or scope of the invention as hereinafter claimed or sacrificing any of its'advantages. r Having thus described my invention, what I claim as new is: T

1. A rotary road drag'comprising a disk, teeth in the disk, a bearing in the center of the disk, a shaft in said bearing rising from the disk, a frame in which'the shaft is mounted, a bar on said frame and a weight slidable on the bar so as to place more weight on one side of the disk than on the other, said disk being hollow, tubes extending through the disk, teeth movably mounted in said tubes, and set screws for holding the tubes in different adjusted positions, said frame comprising an arcuate cross beam having its ends directed downwardly, a pull bar extending from the'center of the beam and inclining downwardly and forwardly, a pull bar piv oted to the lower portion of the shaft, a lever rockable on the first pull bar and pivotally engaged with'the second pull bar so that the shaft may be swung to be disposed at the desired angle to the ground.

2. A rotary road drag comprising a disk,

- teeth in the disk, a bearing in the center of V and set screws for holding the tubes ferent adjusted positions, said frame comprising the disk, a shaft in said bearing rising from the disk, a frame in which the shaft is mounted, a bar on said frame and a weight slidable on the bar so as to place more weight on one side of the disk than on the other, said disk being hollow, tubes extending" through the disk, teeth movably mounted in said tubes,

an arcuate cross beam having its ends directed downwardly, a pull bar extending from the center of the beam and inclining downwardly and forwardly, a pull'bar piv voted to the lower portion of the shaft, a

, at the desired angle to the ground, an arm delever rockable on the first'pull bar and pivotally engaged with the second pull bar so that the shaft may be swung to be disposed pending from the second pull bar and having a roller extending under of the disk. V

In testimony whereof I affix my signature.

CHARLES B. SCHERTZ.

the outer edge 

